Machine tool rapid traverse mechanism



July 25, 1944. H. c. KEMPI-:R` ET AL 2,354,266

` MACHINE TOOL RAPID TRAVERSE MECHANISM Filed Dec. 10, 1942 6Sheets-Sheet l .ll-lll Illllllllllllllll lilllllllllll" lllii.

INV ENTORS. HRRRY C.KENPER A Ro@ R R. Ruzmvm' @mu fg M few July 25,1944,H. C. KEMPER Em i2,3-=4,266

MACHINE TOOL RAPID TRAVERSE MECHANISM Filedneo. 1o, 1942 6 sheets-sheet2 INVNTORS. RRRRY c KemPER ROGER RRuzmKR BY M 'RTToRNE July 25, 1944 H.c. KEMPER ET A1. 2,354,266

MACHINE TOOL RAPID TRAVERSE MECHANISM Filed Deo. l0, 1942 y 6Sheets-Shea?l 3 INVENTORS. HRRRY C. KEMPER RQGER R. RUZJCKR RTT QRNEXmwd M July 25, 1944.

H. C. KEMFERv ET AL MACHINE TOOL RAPID TRAVERSE MECHANISM Filed Deo. l0,19412` e sheets-sheet 4V 'BY 'LOMMAQ HRRRY C.. KEMPER QTTQRNEY `July25,1944. C KEMER. TAL A2,354,266

MACHINE -TOOL RAPID TRAVERSE MECHANISM Filed Dec. 1o, 1942 esheets-sheet 5 I INVENTRS.

HARRY c.. KEMER RTTBRNEY.

Patented July 25, 1944 UNITED STATE g MACHINE 'rooL RAPIDTRAVERSEMECHANISM Harry C. Kemper, Goshen Townshm-"Glermount il Y County, andRoger R. Ruzicka, '.Cincinnati,

ohio, assignors to The n. K. Le Blond Machine, l Tool Company,Cincinnati, Ohio, acorporation. Y

of Delaware Application December1'0, 1942,A Serial No. 468,518

8 claims.V

This invention pertains to machine tool rapid traverse mechanism and isparticularly related to control and operating mechanism for'eifectingrapid traverse movement in the various movable work or tool members ofmachine toolsQfIt is the primary purpose of this vinvention to providecontrol mechanism, for effecting-rapid traverse movement in machineelements, comprising a control lever so arranged that the relativemovement of the'lever to eilect the various trav-V erse movement inthemachine element is ef fected by moving the lever in adirection'correspondiner to the direction of movement of vthe variousmachine elements Which are tobe'ac'itu-v ated at rapid traversemovement. f

More particularly this invention V'is applicable to a machine toolhaving two movable elements movable at right angles to one anotherA andal common single lever control apparatus 'associated with veach of thesemembers, which may 'be' operated in such amanner'as tol causeI thecontrol lever to move in substantially identically the same direction asit is 'desired tomove each of. the respective machineelements.y

-More particularly this inventionis applied to effecting the rapidtraverse movement in a lathe' carriage longitudinallyof thev bed and thecross slide crosswise of the bed. To accomplishftheI result `of thisinvention it is desired "to -h'avefa2 single control lever mounted onthe carriage of. the lathe so that it may be moved'from a neutralposition either toward thelathe spindle axis'or away from the lathespindle axisto'eiiect the corresponding identical movements in the crossslide. It is then the object to provide `an arrangement wherebythe levermay be manipulated so as to cause it to be.l moved into a new plane ofmovement Vcorresponding torthe same direction' of movement as that ofthe lathe carriage longitudinally of the bed vand then to ef-Y rectmovement of this lever in this new oriented' position of carriage traveleithertoward the headstock or toward the tailstockof the lathevto'effect the corresponding rapid traversing of thecarriageof the lathe.'l Further features and advantages of'this in- Vention will appear fromythe detailed description of the drawings in which:

EigureI is an enlarged fragmentary :view o alathe carriage showing thearrangement andv :mode of operation of the single lever controlv foreiiecting both the length traverse and crosstraverse for the lathecarriagefandcross slide.

Figure II is adiagrammatic sectional. View through a typical lathelapron transmission mechanism and rapidtraverse mechanism` associatedwith the control lever of Figure I, shown cn theline II--II of FigureIII. o v Figure III is an `enlarged vv,vertical section through thesingle lever control mechanism Yfor (o1. sag-21.25y f the rapid traverseon the iine'infni of Figures I, II,v IV, V, andVI. Y y

Figure IV is a fragmentary-sectionon the-line IV'-`IV -o fif'igure III,showing'the notched bushing for determining the position 'of operationof the control'leverrffor eifectingfeither the cross' traverse motionor'the length traverse rmotion for: the cross slide and' carriagef ofthe lathe,

"Figure V is ari'v enlarged Vhorizontal section on l0 the line V--Voff'lfigurey III, particularly showing the rack and ypinionmechanismvandclutch gear' associated WiththecOntrOl lever for actuatingthe gear for selecting ,the ylcmgitudinal Vor; cross feed powertransmission.

tion `ron' the linev of` Figure III, vparticu.- larly showing ,theactuating*mechanism for effecting'lthe reversal of the yrapid traversemotion for either the cross slideorvcarri'age oi the lathe 20 bymanipulation of thecontrol '.lever v-to either of its reverse orvforvs'rad positionsy 'for' each of the two positionsv of cross or;longitudinal traverse.

` Figure VII'is a diagrammatic vertical sectional viewl oi the lathecarriage, crossslide, and apron.

is the usual compound rest sand-'m01 slide s.v

carrying a suitable cutting tool 1.

Depending from the front portion 'of the carriage vr3v isfthe latheapron 8 .whichy carries the 0 powertransmission'gearing 'and controlmech-l` anisml for actuating the vcarriage,and cross slide in theirrespeotive'feed and rapid traverse move,- ments.l 'Power for vdrivingthe aprontransmission isre'ceived from the/feedrod '9 whionisappropriately connected in conventional manner to the usuallatheheadsto'ck power.l transmission and Ythis rod 9 extendslongitudinally oi'rthe front of the bed yl. of the lathefand hasasplined portion IDv which slidably engages in a bevel vgear Iljournaled against axial ',movfement in a projecting lugrlzofvthe latheapron 8, 'In4 this way power istransmitted atfall times to the'gear Hfor any position Vthe' apro j may be located along the length of` thebed. y g The bevel gear -Il .isf `connected in driving relationshipwitha bevelgear lil xed on the input shaft I 4 journaled in thelatheapron 8.y Formed. on this shaft Mis a splined portion |15 upon ,which isdrivinglyfmounted 'for/sliding. 0 movement the pinion |6'Which`may beslid into' Figure VI isa similar horizontal enlarged secdirectdriving.:1 engagement Witha afclutchvrgearf gear I9 having the secondgear in engagement With the gear I'I. The gear I6 may also be moved; toa neutral position as shown in Figure In this way reversal of rotationofl drive from'the.y

feed rod 9 to the gear I1 may be effected.

The clutch gear l1 is rigidly fixed to the sld-.l t

able shifter shaft 2| by a suitable nut 22'a2'fand may be axially slidso as to causeJ its clutch teeth 22 to engage the clutch teeth 23 of theclutch member 24 and be slid in the opposite direction the,l gear:andpshaftf( to thechange gears ta-,5| and .the gear 54 directly,tothegear 21 or to the double gear 51 will cause this gear 21 to "rotate andat the same time eifect actuation of ,the ycross feedscrew 48 in timedrelationship and simultaneouslywith movement of the carriage "along thebed of the lathe, to in this way effect ta-per cutting Aoperation in theusual manner. U. Appropriate control` levers (not shown) may be .10*

providedf'ior-actuating thegear I6 on the shaft I4 to Iits""respewfztiveposition and another lever to cause its clutch teeth 25 to 'engagetheclutch teeth 26 of the gear 21 by manipulation of the feed selectorhandle 28 having a tooth 29 engag-Arr ing a shoe 30 inthe annular slot3| vof the shaft 2| as best seen in Figure AVII.;

Theclutchv meinber- 24 h aS- a vpinion 32 which engages Vthe-rack1pinion.gear ;33-.xed l,on the rack Ipinion shaft ,34 `havinga the rack pinionV which operatesin vtherack 36` flxed=tobed I as seen in.FigureVIIf, Thegear21 which isr journaled on` a bushing 36ffiXedin the'apronlhousing- 8engages in. apinion 31 whichis journaled on a stud. 38 and. inturnisconnected,v in driving -Vre of lationship to; thefpinion..39 fixed o n.the cross feed-screw qbysuitablepinslll and 42. This f the lathe apron8.

It will thusbesapparentby appropriately.ma-v

nipulating the lever-.28.50. as to .moveit tothe4 position 28a theclutch teeth 25 of gear I1 willbe engagedl with the `clutch teeth .2.6of gear 21 so that Apovverroxn the feedrod .9 willbe transmitted. ythrough the l-gear :21. to thev cross- `feed screw .40,to

effect crossyslide feed 1, motion. Similarly when the controlleverf.28..is,moved..,to.,position 28h the clutch. teeth 2-2..and,23willbe broughtinto engagement fandfeedingpower from the .feed rod,y

9. Will..b.e. transmitted` .to.,.therackpinion -35 to cause .thelongitudinal .feeding of the 'carriageon theb'edof theelathe.

4Incorporated. inT this., apron ,mechanism is. also means foreffectingthe.Y simultaneous operationof the cross` andlong-itudinalfeeding motion lfortaper turning operations.- (Inthefapron 8, Figure I1,`is a shaft ,41:having'agear-.43 which is in constantV meshy withv thegear 33 ofthe rack pinion shaft. 34` andswhich procleedspoutwardly.toward Sand .carrieslon it anI appropriate change gear. 50.. fwhich..is adapted to.. engage an appropriate mating changegear 5I .on-a shaft52 also jour-4 naleddn the` lathe apron. On this shaft 52 is a splinedportion v53,. which isslidablycarried in driving relationship with thepinion 54 whichfmay be engaged :directly with the gear 21 or .may be.engaged. in reversing driving relationship therewith throughthegears55,and 56 of the double i gear 5 1 on the shaft J4. l In this Way, withtheV gear I1. movedto the-(neutral, position with handle 28` inl thepositionfshown in full lines inFigure VII, with the gear I1 inengagement. with the clutcnmemberZLpower from the. feed rod. 9 will betransmittedfromr lthe shaft I4 tothegear to the gearr to in..l this waycause rotation of the. rack .pinion forflongitudinal movement ofthalathe ,apronf and carriage along. the bed. Similarly thepowertakefoiffrom the'gear 33 to gio,

the frontfthe apron .mw a hange gear Cavity ne# in toward the front ofthe lathe apron 8.

for the gear 5'4`on the shaft 52 in its respective position. f

Rapid power traverse is provided in association with the abovetransmission mechanism whereby the carriage or cross slide maybe`actuated at rapid traverse `movement either independently orsimultaneously and this rapid traverse motion may be effected throughthemedium of thesingle control leverwhichis operable in positioncorresponding to the position of. movement of the respect-ivecarriageand cross. slide. Power for theirapid` traverse movement isderived from the motor'58tted rigidly-,to the left hand face 8a of theapron-8,,as AbestseenV in Figure II, and it has a pinion 58 which; is-connectedto gear 60 journaled Von a stud v6| fixed inthe apron housing8 and also connected to a bevel gear 62 which in turn drives awbevelgear 63 fixed on the shaft 64 appropriatelyjournaled in the latheapronl.` A gear 65 fixedr tothe shaft 64 in driving relationship -tovthe bevel gear 63 is directly connected to a clutch gear 66 journaledon the longitudinal-hand wheel shafty 61 journaled in 64 drives`through' an appropriate idler gear 69 journaled in thevr apron Sito thesecond clutch gear 'I0 alsojournaled onithe hand wheel shaft 61. Boththe gears SI5-and 10 are arranged to be frictionally clutched; by--meansof the respective clutches- 1| and 12 in driving relationship on the;shaft. 611 by actuating the yoke 13 with the shifter memberM ontheshifter rod 15. Thus by engagingfthe clutchk 1| 'the shaft61 will berotated Iin one direction by the motor 58 and by engaging the clutch 12the shaft 61 will be driven inthe opposite" direction from this motor.

The plungers I9and`i15 of Figure VI project outwardly with their ends 1||90. and 15a arranged 1 to engage the'surface |`24`of the hand wheel |25journaled on a'suitable bearingv |26 on the shaft 61; Appropriate clutchlteeth |21 are arranged to engage clutch 'teeth |28'of 'theclutch member|29 to the 'shaft 61 when the hand wheel is moved It is to be noted,therefore, that actuation of the control lever to either position 840 or84d or to position 84e or 841 will cause one or the other of the ends||9a or 15a to rproject outwardly 'and push' the hand wheel outwardly onthe shaft 61 so as 'to disengage the clutch' members I 21 and |28 whenrapid 'traversing motion is applied to the shaft 61. This is done so asto prevent the rapid rotation of the hand wheelwhich would cause injuryto the operator in its fast c spinning motion and would also addunnecessary momentum of the hand wheel |25 and create excessive inertiato the lathe apron mechanism in effecting the starting and stopping ofthe rapid traverse motion thereof. v n Y Slidably mounted indrivingvrelationship on the splined portion 61a of theshaft 61 is thepinion 16' which ,may be slidby the shifter yoke 11 intodrivingvengagement with4 the gear 33 so as to in A gearA 68 fixed to theshaft` `this way connect rapid traverse power to the into engagementwith the idler gear 18 jour-V naled on a stud 19 fixed in the latheapron v8 and which is connected to a gear 88 of a compound journaled ona suitable bushing 82 fixed in the lathe apron' around the rack pinionshaft 34 and which has a gear 83which is in driving relationship withthe gear 21. Thus in the latter case when the gear 16 isshiftedintoengagement with the gear 18reversible rapid traverse vpower may beapplied to the gear 21 and thus to the cross feed screw 48 actuating thecross slide in rapid traverse motion in either direction.

The clutches 1| and 12 and the gear 16 may be operated in apredetermined sequence to effect the rapid traverse movement of thecarriage and cross slide by means of the single control lever 84 whichis mounted rigidly to a rock shaft 85, Figure III, supported by abushing 88 in a bearing 81 in the upper portion of a bracket 88 fixed4to the top surface' of the lathe apron 8 by appropriate screws 89'. Theshaft 85 is also guided' in an appropriate bearing 98 formed in thecenter portion of the bracket 88. On the lower portion of this rockshaft 85 is fixed a clutch piece 9| by a suitable pin 82 and the uppersurface 93 of this clutch piece 9| normally engages the surface 94 ofabushing 95 held in place in a bore 96 formed in the lathe apron 8 bythe bracket 88. This engagement of the surface 93 with the surface 94 isnormally maintained by means of the compression spring 91 engaging thelower end of the bushing 86 and the surface 98- of the bore 81' in thebracket 88.

The clutch piece 9| has clutch teeth 99 which are arranged to engageclutch teeth |88 of a gear the latter being journaled in the bore 96 inthe apron 8 and resting downwardly on a surface [02 of said bore 96.`The clutch teeth 99 and |08 are so arranged that they may be engaged-inonly two positions 90 circumferentially spaced from one another. Inother words-the lever 84 on the shaft 85y may be pushed downwardly asshown in Figures I and III to engage these'clutch teeth and the onlyother provision where this lever could be engaged and could cause theseteeth to be engaged would be a position. 90 circumferentially removedtherefrom. This gear |8| is in mesh with a rack |83, Figure V, formed ona shifter rod |94 slidably mounted in suitable bearings I 85 and |86formed in the walls of the apron 8 of the lathe. On this rod |04 is xedthe shifterfyoke 11 which reaches down each side of the gear 18 on shaft61 so that ain'al sliding of this rod |94 will effect the shifting ofthe gear 16 either intoI engagement with the gear 38 or with the gear 18for effecting respectively the longitudinal traversing of the aproncarriage or the .cross slide traversing. Appropriate stopping means |88and |09 accurately limit the motion of the rod |84 and through themedium of the gear |0| the rocking of the shaft 85 is maintained withinpredetermined limits of rocking motion, in-this particular instance 90,constituting' the limits of movement of the handle 84 from thev'position 84a into the position 841).

In order to limit the point where the lever 84 and the shaft B may bepushed downwardly against the spring 91 to engage the clutch teeth LSil-|08 to the position 84a or the position 84h an,

indexing and locating collar Ill) shown in Figures III and IV is mountedin the bracket 88 and held in place by the bushing 95 and a set screw Iand has formed in it a bore I I2 through which passes the rock shaft 85and in this bore are two cut-out slots 3 and ||4 in which may operate asquared end pin ||5 xed in the rock shaft 85 as best seen in Figure III.Thus only when the contro-liever 84 is in the position 84a or theposition 84h is the pin ||5 lined up with the respective slots ||3 and||4 to permit the lever 84 and i I its shaft 85 to be pressed downwardlyfor engaging the vclutch teeth 99-|80.

The lower -end of the shaft 85 has a cylindrical downwardly projectingportion 85a having a squared end portion 85h nicely fitting in a matingsquare hole in the gear IIEla, which gear is carried in a counter bore||6 of the bore 96 and simultaneously engages' a shifter rod 15 by meansof a rack H8 and a second plunger |I9 through the medium of the rack|28. On the rod 15 is a shifter yoke 14 which engages the clutchoperating spool 13, Figure II, for respectively actuating the clutches1| and 12 by axial motion of the rod 15 when the gear ||5a is rotatedybythe shaft 85 when in the upper position of engagement of its squaredend 85h in the bore of the gear as shown in Figure III. The motion ofthe yoke 13 is limited by the design of the clutches 1| and 12 so thatwhen the control lever 84 is in the position shown in Figures I and IIIthe rocking motion of this lever and shaft 85 when in the upwardposition will be from the position 84C to 84d. Now-when the controllever 84 is depressed at the point 84a so thatthe pin ||5 in shaft 85passes downthrough the slot |3 in the bushing i8 engaging the clutchteethl 99 and |80, the squared end portion 85h of the shaft 85 will bepushed out of the square hole4 of the gear |5a so that the shaft 85 mayrotate without turning the gear |5a; the rods 15 and H9 :being held inneutral position by the detent |22 shown best in Figure VI. Thus theshaft 85 may be rocked by the lever 84 from position 84a to position8412 to turn the gear |8| which will engage the gear 16, Figure II, withthe gear 33 connecting up the shaft 61 with the longitudinal movement ofthe carriage and apron. As soon as the lever arrives at the position Bibthe pin |65 will be in alignment with the slot I4 of the bushing H0 sothat the shaft 85 may again be allowed to come upwardly under theiniiuence of the spring 91. This will again reinsert the squared endportion h of the shaft 85 in the gear lliia but in the new position, inthis instance removed from the previous position 84a so as to againattach this gear ||5a posi` either direction along the ibed. Appropriatede-l 16 in either of its selectedpositions of engagement,

with gear 83 or gear 1,8`

It is to be further noted in connectonwith this novel operatingmechanism that the single handle- Itioned to coincide with the directionof. travely of the member to be actuated when changing from one memberoperating in one direction and another member operating perpendicularlythere.- to. In other Words, as in this `particular illustrative example,when it is desired to operate the cross reed for the 'machine thelevertakes the positions Bda, talc, or 84d, movement'rom position Eta toeither of these positions being in the direction of motion of the crossslide rapid traverse. Similarly when it is desired to actuate thecarriage and apron in longitudinal rapid traversing motion the lever isrepositioned'as described for automatically effecting movement fromposition Sb to tile or 8M corresponding again substantially identicallyto the axial direction of travel of the apron and carriage to beeffected. In this way the control lever is maintained in a deniteoperating plane and is also repositioned for automatically eiectingmovement in direct association with the movement of the member actuatedin rapid traverse motion to in this Way greatly facilitate the ease ofoperation of the machine and eliminate confusion upon the part of theoperator in actuating such mechanism. Likewise a single lever isprovided for effecting both of these motions and is coordinated withtheir motion in this Way to provide a most efficient and easilyunderstood and operated mechanism not entailing great skill and careuponthe part of the operator to prevent damage to the machine tool whichwould necessarily occur in apparatus of this type while rapid motionsare being effected.

summarizing the operation oi this device more specifically, actuation ofthe control lever 84 in horizontal swinging motion in a predeterminedplane is effective for controlling the direction and application of therapid traverse power and its motion in the direction desired indicatesthe direction the machine tool member will be moved.

Pushing the lever down and moving it to a position where it will move inthe direction of another member to be actuated will reposition itautomatically for electing the rapid traversing of this second mentionedmember. Thus, referring to Figure III, rocking oi the lever 84 forrocking the gear lita is for the purpose of initiating and determiningthe direction of rapid traverse power to the member to ibe actuated.Repositioning of the lever 84 'cy depressing it and the spring 91 toengage the clutch members Sl-il serves to reposition the handle indirect line of movement with the member to be moved and simultaneouslyeiect the transmission mechanism of the rapid traverse so as to carryout the actuation of the member in exact movement with that of thedirection. of movement of the lever.

It is to be also noted that when the combined longitudinal and crossfeeding movements are instituted by engagement of gear l1 with clutchmember 24 and with gear 54 driving the gear 21, Figure II, the controllever 84 can effect rapid traverse simultaneously of both of thesemovements so that in taper cutting, rapid traversing of the tool backalong the taper can be undertaken without diiiculty. It is to be notedthat the control lever 84 may be operated in either of the positions 84hto 84d or 84e to 84j accomplishing the same result in both instances,thoughv it is preferable to operate it in the length traverse positionWith the gear 'I6 engaged with the gear 33 to get the most efficient andbest drive for the,r

Having thus fully set forth and described ou l invention what we claimis new and desire-to secure by United States Letters Patent is:

1. In a lathe, a carriage, a cross slide on said carriage, rapidtraverse mechanism for actuating said carriage and cross slide in rapidtraverse movement, means for alternately connecting said rapid traversemechanism to said carriage or said cross slide, means for reversiblyeffecting thedriving power to said carriage or cross slide, a singlecontrol lever mechanism associated with saidinterconnecting means forthe carriage and cross slide and said reversing means associatedtherewith for operating themin a predetermined sequential relationship,means for operating said control lever in a direction corresponding tothe direction of rapid traverse of said carriage and cross slide, means.for maintaining said control lever, While operable for effecting therapid vtraversing motion of either the carriage or cross slide in acommon plane on swinging movement, means for repositioning said handleso that its movement will correspond to the direction of movement of themember to .be rapid traversed comprising means permitting the depressingof said handle and moving it to its new oriented posi-A tion, and meanspermitting it to rise again into said common plane of movement foreiecting said rapid traverse motions.

2. In a lathe, a carriage, an apron mounted on said carriage, a crossslide mounted on said carriage, apron transmission mechanism associatedwith said carriage and cross slide, rapid traverse transmissionmechanism in said apron associated with said apron transmissionmechanism having means for alternately engaging the rapid traversemechanism with said carriage or cross slide, reversible powertransmission mechanism associated with said rapid traverse mechanism forcausing reversal of traversing motion in said carriage or cross slide, asingle lever control apparatus mounted on said apron comprising acontrol lever swinging'into segmental paths in a direction correspondingto the direction of traverse movement of said carriage in one segmentand having a direction of movement corresponding to the direction oftraverse of said cross slide in the other segment, and means for movingsaid lever in the same horizontal plane in both positions of carriageand cross slide travel, each side of a neutral. position, for eachsegment, for initiating the rapid traverse movement in the correspondingmember in one direction or the other;

3. In a lathe, a carriage, an apron mounted on said carriage, a crossslide mounted on said carriage, apron transmission mechanism associatedwith said carriage and cross slide, rapid traverse transmissionmechanism in said apron associatedv ing to the direction of traverse `ofsaid cross slide,

means conning the movement of said lever to the same horizontal plane inboth positions of carriage and cross slide travel, each side of aneutral position for initiating the rapid traverse movement in thecorresponding member in one direction or the other, repositioning meansassociated with said control lever permitting depressing of said leverand swinging it tothe position of movement desired for said carriage orcross slide means to return said handle to the common plane ofoperativeness for initiating the rapid traverse movement.

4. In a power transmission and control mechanism, a source of power,means for reversibly connecting said source of power to an output shaft,means on said output shaft for alternately connecting said shaft to oneor the other of a pair of members to be driven, a single control leverassociated with said reversing means and connecting means for operatingsame in a predetermined sequential relationship, means for operatingsaid single control lever in a common plane in two different directionscorresponding to the two members to be actuated by the connecting means,and means operable by depressing said lever to a lower plane androtating it to a new operativeposition therein to eifect connection ofyone or the other of said members to said shaft. f

5. In a single lever control mechanism, a prime mover, a pair ofreversing clutch mechanisms connecting said prime mover to a powershaft, means on said shaft for alternately connecting said shaft to oneor the other of two members to be driven, a' single control leverassociated with said reversing mechanismsv and connecting means,actuating mechanism associated with said control lever for renderingsaid reversing mechanism operative by swinging said lever in apredetermined horizontal plane from one side to the other of a neutralposition, means operable by depressing said lever below saidpredetermined plane and swinging it to a new oriented circumferentialposition for effecting the connecting of the output shaft to one or theother of said members to kbe driven, and means operable by raising ofsaid lever to said predetermined plane of operation to again institutethe reversible power transmission to the member engaged by the means foralternately connecting said shaft to one or the other of the drivenmembers.

6. In a single lever control mechanism, a prime mover, a pair lofreversing clutch mechanisms connecting said prime mover to a powershaft, means on said shaft for alternately connecting said shaft to oneor the other of two members to be driven, a single control leverassociated with said reversing mechanisms and connecting means,actuating mechanism associated with said control lever for renderingsaid reversing mechanism operative byswinging said lever in apredetermined horizontal plane from one side to the other of a neutralposition, means whereby depressing of said lever below saidpredetermined plane and swinging it to a new oriented circumferentialposition effects the connecting means to connect said shaft to one orthe other of said members to be driven, and means whereby release ofsaid lever again permits said lever to rise to said predetermined lplaneof operation for again' instituting the reversible power transmission tothe member connected to said output shaft, and means whereby saidcontrol lever is ineffective to operate said reversing mechanism when'said output shaft is being reconnected to one or the other of saidmembers to be driven.

7. In a single lever control mechanism, a prime mover, a pair ofreversing clutch mechanisms connecting said prime mover to a powershaft, means on said shaft for alternately connecting said shaft to oneor the other of two members to be driven, a single control leverassociated with said reversing mechanisms and connecting means,actuating mechanism associated with said control lever for renderingsaid reversing,

mechanism operative by swinging said lever` in a predeterminedhorizontal plane from one side to the other of a neutral position, meanswhereby depressing of said lever below said predetermined plane andswinging it to a new oriented circumferential position effects theconnecting means to connect said shaft to one or the other of saidmembers to be driven, and means whereby release of said lever againpermits said lever to rise to said predetermined plane of operation foragain instituting the reversible power transmission to the memberconnected to said shaft,

and means whereby said control lever is ineffective to operate saidreversing mechanism when said output shaft is being reconnected to oneor the other of said members to be driven, and means whereby saidcontrol lever, -when operated in a depressed position below saidpredetermined plane for effecting reconnection of said shaft with one orthe other of said members to be driven, is ineffective to control thereversible power transmission mechanism.

8. In'a, lathe apron transmission mechanism, a rapid traverse motor, alongitudinal movement hand wheel shaft, a hand wheel journaled on saidshaft and clutchable therewith, a pair of reversing clutch mechanismsmounted on said hand wheel shaft, a shifteryoke for actuating saidclutches alternately for connecting said rapid traverse motor fordriving said shaft in one direction or the other, a shiftable gearmechanism on said shaft for alternately connecting power therefrom tothe longitudinal or cross feed movement ofsaid lathe, a tool carriageand cross slide, a single control lever mounted on said apron operablein a predetermined horizontal plane and in a direction corresponding tothe movement of said carriage and cross slide for effecting theoperation of said rapid traverse power from said motor to said carriageand cross slide in one direction or the other by actuating saidreversible clutch mechanism, means whereby said lever may be depressedand swung to a new operative position corresponding to the positiondesired for said carriage or cross slide whereby said connecting gearingmay be connected to said carriage or cross slide actuating mechanism,and means whereby said hand wheel may be engaged with said hand wheellshaft for rotating said shaft 1 manually when said rapid traversemechanism is in neutral position with both of said reversing clutchmechanisms inoperative, and means whereby actuation of said lever to.renderone or the other of said clutches operativeautomatically'disengages said hand wheel from connection with saidshaft.

HARRY C. KEMPER.

ROGER.- R. RUZICKA.

